Nuclear reactor monitoring device, nuclear reactor control device, and nuclear power generation plant

A nuclear reactor control device comprising:

• a reactor core state quantity detecting unit that detects the state quantity of a reactor core in a nuclear reactor;
• a reactor core performance data generating unit that generates reactor core performance data on the basis of the state quantity of the reactor core detected by the reactor core state quantity detecting unit;
• a reactor core prediction data generating unit that predicts and calculates a change with the passage of time of the reactor core on the basis of a current reactor core operation condition and the reactor core performance data, to generate reactor core prediction data;
• a reactor core prediction data generation timing setting unit that performs the generation of the reactor core prediction data by the reactor core prediction data generating unit when the reactor core performance data exceeds a preset prescribed range;
• an operation control console panel that performs the operation of the nuclear reactor;
• and
• an operation monitoring monitor capable of switching display contents with the operation control console panel and capable of displaying the reactor core performance data and the reactor core prediction data.